GB1393579A - Method of producing high density silicon nitride - Google Patents

Method of producing high density silicon nitride

Info

Publication number
GB1393579A
GB1393579A GB5244572A GB5244572A GB1393579A GB 1393579 A GB1393579 A GB 1393579A GB 5244572 A GB5244572 A GB 5244572A GB 5244572 A GB5244572 A GB 5244572A GB 1393579 A GB1393579 A GB 1393579A
Authority
GB
United Kingdom
Prior art keywords
silicon nitride
powder
high density
hot pressed
producing high
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB5244572A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
National Research Development Corp UK
Original Assignee
National Research Development Corp UK
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by National Research Development Corp UK filed Critical National Research Development Corp UK
Priority to GB5244572A priority Critical patent/GB1393579A/en
Priority to DE2356921A priority patent/DE2356921C2/en
Publication of GB1393579A publication Critical patent/GB1393579A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/515—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics
    • C04B35/58—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on borides, nitrides, i.e. nitrides, oxynitrides, carbonitrides or oxycarbonitrides or silicides
    • C04B35/584—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on borides, nitrides, i.e. nitrides, oxynitrides, carbonitrides or oxycarbonitrides or silicides based on silicon nitride
    • C04B35/593—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on borides, nitrides, i.e. nitrides, oxynitrides, carbonitrides or oxycarbonitrides or silicides based on silicon nitride obtained by pressure sintering
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/71—Ceramic products containing macroscopic reinforcing agents
    • C04B35/74—Ceramic products containing macroscopic reinforcing agents containing shaped metallic materials
    • C04B35/76—Fibres, filaments, whiskers, platelets, or the like
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/71—Ceramic products containing macroscopic reinforcing agents
    • C04B35/78—Ceramic products containing macroscopic reinforcing agents containing non-metallic materials
    • C04B35/80—Fibres, filaments, whiskers, platelets, or the like

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Ceramic Products (AREA)

Abstract

1393579 Hot pressed silicon nitride NATIONAL RESEARCH DEVELOPMENT CORP 9 Nov 1973 [14 Nov 1972] 52445/72 Heading C7D Si 3 N 4 bodies are produced by compacting Si powder to a required shape, reaction sintering in N 2 to form a Si 3 N 4 body which is then hot pressed. The reaction sintered body is preferably infiltrated with a flux such as the oxide or nitride of Mg, Be or Ca or Al 2 O 3 or Fe 2 O 3 prior to hot pressing at 1600-1850‹C at 1¢ t.s.i. in graphite dies coated with BN. The Si powder may be mixed with 1-50% vol. of SiO 2 , SiC, graphite, BN, Al, Ti or Fe powder or fibres prior to compaction. The hot pressed Si 3 N 4 may then be annealed.
GB5244572A 1972-11-14 1972-11-14 Method of producing high density silicon nitride Expired GB1393579A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB5244572A GB1393579A (en) 1972-11-14 1972-11-14 Method of producing high density silicon nitride
DE2356921A DE2356921C2 (en) 1972-11-14 1973-11-14 Process for the production of silicon nitride bodies by reaction sintering of silicon powder in a nitrogen atmosphere and subsequent pressure sintering

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB5244572A GB1393579A (en) 1972-11-14 1972-11-14 Method of producing high density silicon nitride

Publications (1)

Publication Number Publication Date
GB1393579A true GB1393579A (en) 1975-05-07

Family

ID=10463949

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5244572A Expired GB1393579A (en) 1972-11-14 1972-11-14 Method of producing high density silicon nitride

Country Status (2)

Country Link
DE (1) DE2356921C2 (en)
GB (1) GB1393579A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3106675A1 (en) * 1980-02-23 1981-12-17 Nippon Kokan K.K. Silicon nitride / boron nitride composite or -MIXED INTERMEDIATE BODY AND METHOD FOR THE PRODUCTION THEREOF
US4351787A (en) * 1977-12-23 1982-09-28 Fiat Societa Per Azioni Process for sintering reaction bonded silicon nitride
WO1984001371A1 (en) * 1982-09-30 1984-04-12 Ford Werke Ag METHOD OF MAKING REACTION BONDED/HOT PRESSED Si3N4 FOR USE AS A CUTTING TOOL
WO1984001373A1 (en) * 1982-09-30 1984-04-12 Ford Motor Canada METHOD OF MAKING HIGH STRENGTH HOT PRESSED Si3N4

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4388255A (en) * 1981-03-27 1983-06-14 Boeing Aerospace Co. (A Division Of The Boeing Company) Method for producing pre-shaped α-silicon nitride whisker compacts and loose whiskers for composite material reinforcement
US4579699A (en) * 1983-09-29 1986-04-01 The Boeing Company Method for making α-Si3 N4 whiskers and articles therefrom

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1069108A (en) * 1965-04-22 1967-05-17 Montedison Spa A process for preparing silicon nitride articles
GB1340696A (en) * 1970-07-10 1973-12-12 Lucas Industries Ltd Method of manufacturing silicon nitride products

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4351787A (en) * 1977-12-23 1982-09-28 Fiat Societa Per Azioni Process for sintering reaction bonded silicon nitride
DE3106675A1 (en) * 1980-02-23 1981-12-17 Nippon Kokan K.K. Silicon nitride / boron nitride composite or -MIXED INTERMEDIATE BODY AND METHOD FOR THE PRODUCTION THEREOF
US4412008A (en) * 1980-02-23 1983-10-25 Nippon Kokan Kabushiki Kaisha Composite sinter of silicon nitride/boron nitride and method for manufacturing thereof
WO1984001371A1 (en) * 1982-09-30 1984-04-12 Ford Werke Ag METHOD OF MAKING REACTION BONDED/HOT PRESSED Si3N4 FOR USE AS A CUTTING TOOL
WO1984001373A1 (en) * 1982-09-30 1984-04-12 Ford Motor Canada METHOD OF MAKING HIGH STRENGTH HOT PRESSED Si3N4

Also Published As

Publication number Publication date
DE2356921A1 (en) 1974-05-30
DE2356921C2 (en) 1982-09-23

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
732 Registration of transactions, instruments or events in the register (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19921109